from the paper ... all the info on the CPUs/Threads is there:
"All the experiments are conducted on a server equipped with two 22-core/44-thread processors (Intel Xeon E5-2699A v4 2.40GHz) and one NVIDIA TeslaV100 Volta 32GB GPU. "
"As mentioned before, ourmachine has 44 cores, and each core can have 2 threads.However, we disable multithreading and the effective number of threads and cores is the same. Hence, we interchangeably use the words “threads” and “cores” from here on. We benchmark both frameworks with 2, 4, 8, 16, 32, 44 threads."